Spatial Relationships

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Spatial Relationships

• Points, lines, polygons....
• Finding features
• nearby
• adjacent to
• within
• intersecting
• containment

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Nearby

• Essentially form a buffer and select all
  features within the buffer.....
• Can be performed on Points, lines, and
  polygons...
• You will have a target (must be active) theme,
  and a selector theme..
• Selector theme will select features from the
  target theme....

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Use Select by Theme
Units?
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The Table - again...
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Using Point themes

• Find how many point discharge sites are within 1
  mile of the major cities in the basin......

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What about adjacent to?

• What would we do?

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Distance 0
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Polygons within polygons

• This will select all features (polygons) that are
  within a given polygon...
• What happens if I have a few polygons of the
  selector theme selected

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Select by Theme
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Anything wrong?
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Finding Features Within..

• Also works well with points...

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Features that Intersect other Features......
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